Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Chernoff Faces(also: Chernoff's Faces)
- A visualisation technique introduced by Herman Chernoff in 1973 that represents multivariate data by mapping each data variable to a facial feature — eye size, eye spacing, nose length, mouth curvature, face shape, and so on — producing one cartoon face per data sample. The idea…
- Click-Time Distribution(also: Timing Profile, Click Precision)
- A statistical model of when a switch user activates their switch relative to a target timing event, used to characterize the precision and consistency of a user's motor control. In the Nomon interface, the click-time distribution measures how accurately a user clicks when a…
- Cohen's Kappa(also: Kappa Statistic, Kappa Coefficient)
- A statistical measure of inter-rater reliability that accounts for agreement occurring by chance, used to assess the consistency between two or more raters coding qualitative data. Values range from -1 to 1, where 1 indicates perfect agreement, 0 indicates agreement no better…
- Cumulative Link Mixed Model(also: CLMM, Ordinal Mixed Model)
- A statistical model for analysing ordinal outcome data (such as Likert-scale ratings) that includes both fixed effects (experimental conditions) and random effects (participants, stimuli). CLMMs use a link function — commonly logit — to relate ordered categorical responses to…
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